如何在tarfile中模仿`--numeric-owner`？

import os
import tarfile
import pwd
import grp

def get_numeric_owner(path):
    stat_info = os.stat(path)
    uid = stat_info.st_uid
    gid = stat_info.st_gid
    # 将UID和GID转换为数字形式
    return uid, gid

def create_tar_with_numeric_owner(tar_filename, files):
    with tarfile.open(tar_filename, "w") as tar:
        for file in files:
            uid, gid = get_numeric_owner(file)
            # 创建一个新的tarinfo对象，并设置uid和gid为数字
            tarinfo = tar.gettarinfo(file, arcname=os.path.basename(file))
            tarinfo.uid = uid
            tarinfo.gid = gid
            # 添加文件到tar归档中
            with open(file, "rb") as f:
                tar.addfile(tarinfo, f)

# 使用示例
files_to_archive = ["file1.txt", "file2.txt"]
create_tar_with_numeric_owner("archive.tar", files_to_archive)